The Negroni cocktail is a classic Italian cocktail made with gin, Campari, and vermouth. It was created in Florence, Italy in 1919 by bartender Count Camillo Negroni. The recipe is simple, but the flavors are complex and well-balanced.

What makes the Negroni so unique is its chemistry. The Campari, gin, and vermouth all have different flavor profiles that balance each other out. Campari is a bright, herbal liqueur with a slightly bitter taste. Gin is a clear, juniper-flavored liquor. And …